*{
    margin: 0;
    padding: 0;
}
ul,li{
    list-style: none;
}
body, html{
    height: 100%;
    width: 100%;
}

h1{
    color:orange;
    margin: 30px auto;
}
.banxin{
    width: 100%;
    height: 100%;
    background-size:100% 100%;
    background-image: url(https://t7.baidu.com/it/u=1595072465,3644073269&fm=193&f=GIF)  ;
    background-repeat: no-repeat;
    display: flex;
    
}
.box{
    margin:auto;
    width: 40%;
    height: 500px;
    background-color: #fff;
   display: flex;
   flex-direction: column;
   justify-items: center;
   border: 3px solid black;
   border-radius: 20px;
   background: url(http://pic.51yuansu.com/pic3/cover/02/78/38/5a3b7ec66c0c8_610.jpg) no-repeat;
   background-size: 100% 100%;
   /* align-items: center; */
}
span{
    padding: 20px;
    opacity: 0.8;

}
input{
    width: 70%;
    height: 30px;
    margin-top: 20px;

}

.bt{
    width: 150px;
    margin: 220px auto;
    
}
button{
    margin: 0 auto;
    display: flex;
    height: 40px;
    line-height: 40px;
    padding: 0 10px;
}
